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NOTE: Yesterday afternoon, Shuttle managers decided to conduct inspections of "pyro can" fixtures in Atlantis' aft compartment. The "pyro cans" cover pyrotechnic devices that separate the external tank from the orbiter at its two aft attachment points. Inspections of both Space Shuttle Discovery and Columbia have revealed deformation in the bolt holes of the plate assemblies that the "pyro cans" are affixed to. The planned inspection will reveal if the same deformation exists on Atlantis, and if any additional work is necessary.

Launch managers do not forecast a change in the launch date at this time. Pending resolution of the bolt hole issue, managers hope to roll Atlantis to the VAB this weekend to begin ET mating operations.

In the VAB, external tank and SRB postmating close-outs are in work and preparations continue for orbiter/ET mating.

STS-84 SCHEDULED OPERATIONAL MILESTONES (dates are target only):

Roll over to the VAB (Saturday) Orbiter mated to ET and SRBs (weekend) Spacehab payload to the pad (April 22) Orbiter to the pad (April 25)

NOTE: Installation of fuel cell No. 1 is complete and leak checks are in work. Preparations continue for main engine removal on Friday and Saturday. Functional checkout of the forward reaction control system is in work. The FRCS will be removed on Friday and transported to the Hypergol Maintenance Facility for thruster replacement work.

NOTE: Preparations continue for forward reaction control system installation on Monday. Water spray boiler checkouts continue. The payload bay radiator inspections are complete and payload premate activities are in work today.

NOTE: Purge lines have been hooked up to the orbiter in the VAB and will remain in place until its transfer to OPF bay 3, scheduled to occur after Atlantis moves to the VAB. No work is scheduled for Endeavour while in the VAB. The "pyro can" bolts and plate will be inspected in Endeavour's aft compartment once it arrives in the OPF.